High-voltage switch



Feb. 3. 1925.

R. H. MARVIN HIGH VOLTAGE swITcH Filed June '1, 1921 2 sheets-sheet 1 Elch/#RU H. MHRA/nv BY A 'E m Feb. 3. 1925. 1,525,407

Y R. H. MARVIN HIGH VOLTAGE SWITCH Filed June l 1921 2 Sheets-Sheet 2 INVENTUR 'RUC/#4R0 H. /VIHfYl//N ATTORNEYS Patented Feb. 3, 1925.

RICHARD H. MARvIN,

& soNs COMPANY,

YUNITED STA 'rE-s PATENT. "oi-Ficav HIGH-VOLTAGE SWITCH. f.

I Application filed June 1,

To all whom 'it may concern.:

Be it knownthat I, RICHARD H. MARVIN,

a citizen of the residing at East` e Columbiana and vented ce ments in I-Iigh United Liverpool, in the countyof rtain new and useful -Voltage Switches,

States of America,

State of Ohio, have in- Improveof which the following isa specification.

My switches, and particularly to a switch for power thousand or more volts.

invention relates to high voltage lines ofone hundred The ob'ectof my insulators 8 clamps 10 and 11, by which 12 is supported from the insulators. present installation, three-phase circuit, the tower structure comf.

of such high voltage.

In the accompanying Fig. 1 is an tower and switch drawingsend elevation of a switch I, in which my invention is embodied in one form;

Fig. 2 Fig. 3 switch terminal the switch, and drawn to Fig. 4 is a section on is a side 3; and

Fig. angles to Fig. 3, showingv tacts open.

An insta ent type comp the head of which and is' a broken side elevation o Y,

s in the closed position 'o elevation thereof;

f the a larger scale; the line 4-4, Fig.

is a broken side elevation at right the switch conllationV for a switch ofthe presrises a structural tower 6, to at 7 are connected strain 9 with associated cable the power cable In the which is designedfor a prises three such umts, the unit 6 being supplemented by like clamps 10 provided wi connected to th present switch,

the

vterminal 18, is adapted to be connecte the movable contact of the switch. In view of the len nected to t I prefer cable,I which prevent its lateral for wei

point that this purpose I ght 19 secured the vertical play o f/the `switch contact end of the and 11, One'end th a terminal 16 adapted to be e stationary .while the other `end, 17 fof,

h of the e movable contact of the switch,

to provide it with some units 13 and 14, as indi- 15 of the cable is contact of the is also fprovided with .a d to end 17, which is conmeans to swaying inthe wind, and haver here indicated a to the cable end at such cable is not impeded.

.pin vfixed contact 22 of the disconnectf switch contacts,

'switches simultaneously.

' associated mechanism,

i921. Seriana-174,056. l

, Supported below the head of the towerV is a multi-unit post insulator 20; to the bottom 21 of which (Figs. 3v'to 5) is securedithe switch. A'fSecOnd post insulator 23, mounted onl a vertically GU movable plunger 24, has attached to the. cap 25 of the top unit the movable switch contact1,2 6. In l,the form here shown, the fixed contact 22 comprises a pair of brushes, between which the movable. switch contact 26 enters and is engaged with anqappro- *A priate wiping contact. As here indicated, the contacts 22 and 26, respectively, are mounted in suitable screw bases 27 and 28, l beneath which the terminals 16 and '17 of 70v the power cablev are gripped when the contact bases 27 and 28 are screwed into their respective post or cap` supports on the insulators 20 and 23. Any other suitable meansA may be provided for establishing electrical-,75 connection between the cable ends andthat shown being merely an illustrative installation.

I have also indicated a hood 29, supported by the contact base 27 and surrounding the fixed contact 22so that in the closed position of the switcli'the contacts are housed against snow, rain, sleet, etc.y The hood 29 performs 4 the further function of serving as an arcingvterminal on the opening of the switch,- and also to prevent corona formation at the contact. It cooperates with'L an arcing ring 30 carried by cap 25 and surrounding the movable contact 26. p

The plunger 24 on which the insulator 90 23 i's'supported, may be vertically moved'by any suitable means. I have here indicated a pair of cross beams 31 and 32thro11gh which the plunger passes, andI by which it is vertically guided to maintain the precise alignment of the insulators 2O and 23 on the opening. and closing movements of the switch. At the lower end of the plunger is pivoted a link 33 jointed to a toggle arm 3 4 fast on fthe shaft 35, which is supported 100 in brackets 36 on the foot piece 37 of the A tower structure, and extends longitudinally thereof a suicient distance to serve the three On the shaft is a worm wheel 38 meshing with aworm 39, 105

which may be rotated by a hand crank 40,-

or other suitable means. The Weight of the several movable posts- 23, and their may be counterweighted at 41 to ease the, operation of the 11o hand crank 40. As will be noted, thejoint 42 between the arms 33 and 34 of the lifting and lowering toggle is located a trifle over center in the closed position of the switch, and is thus self-sustaining in closed position without strain on the lifting and lowering gear.

It will be noted that by mounting the switch contacts at the adjacent ends of thel pair of aligned post insulators, one of which is vertically reciprocated, there is no side strain on the insulator posts, and the latter are subjected only to compression strains; This is quite readily taken care of and af-l fords no mechanical difficulties such as are presented where insulators of thistype are subjected to lateral thrusts. The construction as a whole is rigid, while at the same time simple and eliicient. It will of course be understood that a switch of this type is not primarily designed for ybreaking the circuit under load, but is used in connection with appropriate oil switches as an auxiliary disconnecting switch for maintaining the circuit open, even should the oil switch be accidentally closed. Any suitable device may be associated with the operating lustrative embodiment of invention.

regarded as a limiting indication of what l claim as my I claiml. A switch for high voltage lines comprising a post insulator having at its lower end a tapped pin, a switch contact base having a threaded boss adapted to screw into said tapped post, together with a corona hood and a cable terminalclamped between the'contact base and the insulator pin by the engagement of the Contact base with the pin.

f 2. ln a switch for high voltage lines, a post insulator having"a cap tapped in its upper surface, a switch contact member having a boss threaded to engage' the insulator cap, a cable terminal clamped beneath the base/of the Contact element, and an arcing ring carried by the cap and surrounding said contact and projecting beyond the free end thereof.

" 3. A switch for high voltage lines com prising a pair of substantiallyvertical and' aligned ,multi-unit post insulators, a. supporting structure to which the upper end of one unit` is fixedly attached, a vertically reciprocating support aligned with rthe insulators and to which the lower end of the other multi-unit post is'lixedly attached, cooperating contacts at adjacent ends of said multi-unit insulators, means for attaching cable ends directly to the contact elements, and means spaced from the cable endattached to the vertically movable contact to maintain the freely swinging cable end clear of supporting structure.

In` testimony whereof I have signed my name to this specification.

RICHARD H. MARVIN. 

